alc885-gr Realtek Semiconductor Corporation, alc885-gr Datasheet - Page 19
Manufacturer Part Number
7.1+2 Channel High-performance Hda Codec With Content Protection
Realtek Semiconductor Corporation
The HDA controller supports two SDOs for the outbound stream, up to 15 SDIs for the inbound stream.
RST#, BCLK, SYNC, SDO0, and SDO1 are driven by controller to codecs. Each codec drives its own
point-to-point SDI signal(s) to the controller.
Figure 6 shows the possible connections between the HDA controller and codecs:
• Codec 0 is a basic connection. There is one single SDO and one single SDI for normal transmission
• Codec 1 has two SDOs for doubled outbound rate, a single SDI for normal inbound rate
• Codec 3 supports a single SDO for normal outbound rate, and two SDIs for doubled inbound rate
• Codec N has two SDOs and multiple SDIs
The multiple SDOs and multiple SDIs are used to expand the transmission rate between controller and
codecs. Section 7.2 Frame Composition, page 12 describes the detailed outbound and inbound stream
compositions for single and multiple SDOs/SDIs.
The connections shown in Figure 6 can be implemented concurrently in an HDA system. The ALC885 is
designed to receive a single SDO stream.
7.1+2 Channel High-Performance HDA Codec
With Content Protection
. . .